When a new tank bottom has been installed in a floating roof tank, what consideration must given to the floating roof level?

The floating roof will find its own level

The support legs can be jacked up or shortened by the same amount as the thickness of the cushion and new bottom plate

The support legs can be jacked up or shortened by the same amount as the thickness of the cushion

The support legs can be jacked up or shortened by the same amount as the thickness of the new bottom plate